gistfile1.sh

# I have a command "opm" which takes, for example argument like:
# opm lfs-base/gcc-4.2 configure
#
# The first argument represents a build script in the format of <category>/<package>-<version>
#
# These build scripts are stored within /var/opm/opms/ in a structure similar to:
# .
# |-- lfs-base
# |   |-- autoconf
# |   |   |-- 2.69.opm
# |   |   `-- base.opm
# |   |-- automake
# |   |   |-- 1.13.1.opm
# |   |   `-- base.opm
# |   |-- bash
# |   |   |-- 4.2.opm
# |   |   `-- base.opm
#
# I would love this directory / filename structure bash completed but am completely stuck.
#
# Below is what I have so far:
#

_opm_complete()
{
    case $COMP_CWORD in
    1)
        COMPREPLY=()
        cur=${COMP_WORDS[COMP_CWORD]}
        words=(/var/opm/opms/*)
        mapfile -t < <(compgen -W "${words[@]##*/}" -- "$cur")
        COMPREPLY=("${completions[@]}"}
        ;;
    2)
        opts=(fetch unpack prepare configure compile install package merge unmerge clean)
        COMPREPLY=($(compgen -W "${opts[@]}" "${COMP_WORDS[$COMP_CWORD]}"))
        ;;
    *)
        COMPREPLY=("")
        ;;
    esac
}

complete -F _opm_complete opm